Lion's ManevsNAC (N-Acetyl Cysteine)

Lion's Mane contains two classes of bioactive compounds: hericenones (A-H, found in the fruiting body) and erinacines (A-I, found in the mycelium). Both stimulate the synthesis of nerve growth factor (NGF) in astrocytes and neurons — hericenones may act through enhancement of NGF gene expression, while erinacines cross the blood-brain barrier and directly induce NGF. NGF binds to TrkA receptors and is essential for the survival, maintenance, and regeneration of cholinergic neurons, particularly in the hippocampus and basal forebrain. This promotes neurogenesis, dendritic arborization, and remyelination of nerve fibers. Lion's Mane also reduces neuroinflammation through inhibition of NF-κB signaling and suppression of pro-inflammatory cytokine production. It may enhance BDNF expression and support the gut-brain axis.

NAC provides cysteine, the rate-limiting substrate for glutathione (GSH) synthesis via gamma-glutamylcysteine ligase (GCLC) and glutathione synthetase (GSS). GSH is the primary intracellular antioxidant, essential for GPx and GST-mediated detoxification of reactive oxygen species in neurons. NAC also modulates glutamate via the cystine-glutamate antiporter (System Xc-, composed of xCT and 4F2hc) — NAC is deacetylated to cysteine, which exchanges for glutamate; the increased extracellular cystine is reduced to cysteine intracellularly, while the exchange increases extrasynaptic glutamate, which activates inhibitory mGlu2/3 autoreceptors on presynaptic terminals, reducing excessive glutamatergic signaling and compulsive behaviors. This glutamate modulation is the basis for psychiatric applications (OCD, addiction). NAC may also directly modulate NMDA receptors via redox sites.